On board the Type 12 general purpose frigate Plymouth (1959) alongside the south side of number 3 basin in Chatham Dockyard at the end of a modernization which commenced in August 1966. The ship is berthed starboard side to the quay. The photographer is in the main communication office between 32½ and 35 stations on the starboard side of 2 deck looking forward showing Bay No. 1 fitted with a D/F receiver F.M.B. and a morse key and Bay No. 2 fitted with a B40 receiver, an Olivetti 82 typewriter and a morse key. Three fuse panels are on the left. A vertical format negative.